Load Specifications
Load data in caliber 6.5 x 64 Brenneke with .264 | 120gr | Peregrine Glider GRM bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Alliant Reloder-16.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 54,795 psi | 88% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,156 psi | 85% | 2864 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,995 psi | 80% | 2890 fps | 98.7% |
| Accurate 4064 | <<locked>> | 86% | 55,013 psi | 88% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,231 psi | 90% | 3012 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,216 psi | 89% | 3097 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 82% | 54,810 psi | 88% | 2936 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,970 psi | 90% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,766 psi | 86% | 2992 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,187 psi | 88% | 3068 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 53,737 psi | 86% | 2989 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,171 psi | 85% | 2913 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,490 psi | 86% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,359 psi | 86% | 3015 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,766 psi | 88% | 3045 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,982 psi | 85% | 2979 fps | 97.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,053 psi | 80% | 2972 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,021 psi | 75% | 2913 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,060 psi | 66% | 2818 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,346 psi | 87% | 3117 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,955 psi | 88% | 2956 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 53,867 psi | 86% | 2930 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,053 psi | 80% | 2972 fps | 96.7% |
| Bofors RP7 | <<locked>> | 90% | 53,461 psi | 86% | 2907 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 86% | 54,476 psi | 87% | 2946 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,027 psi | 88% | 3009 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 54,882 psi | 88% | 2969 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 82% | 55,463 psi | 89% | 2949 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,824 psi | 86% | 2943 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,709 psi | 89% | 2986 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,361 psi | 89% | 3048 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 58% | 1837 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 52,953 psi | 85% | 2894 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,985 psi | 90% | 2927 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,550 psi | 89% | 2927 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,810 psi | 88% | 2907 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 54,404 psi | 87% | 2940 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,201 psi | 89% | 2940 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 52,881 psi | 85% | 2946 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 54,911 psi | 88% | 2966 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,839 psi | 88% | 2910 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,896 psi | 86% | 2864 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,521 psi | 89% | 2920 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,998 psi | 88% | 2933 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 56,231 psi | 90% | 2972 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,365 psi | 66% | 2733 fps | 97% |
| Norma 201 | <<locked>> | 82% | 53,287 psi | 85% | 2877 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,273 psi | 87% | 2881 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,028 psi | 90% | 2972 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,056 psi | 88% | 2992 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 53,316 psi | 85% | 3064 fps | 98.6% |
| Norma URP | <<locked>> | 94% | 54,897 psi | 88% | 2995 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 53,345 psi | 86% | 2943 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,751 psi | 86% | 2995 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,753 psi | 59% | 1883 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,375 psi | 87% | 2927 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,114 psi | 87% | 3002 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,418 psi | 87% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,130 psi | 90% | 3035 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,969 psi | 88% | 3068 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 53,911 psi | 86% | 2877 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,708 psi | 86% | 2920 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,709 psi | 89% | 2966 fps | 96.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 3025 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 53,461 psi | 86% | 2907 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,998 psi | 88% | 2933 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,839 psi | 88% | 2910 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,521 psi | 89% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,231 psi | 90% | 2972 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,695 psi | 89% | 2986 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,956 psi | 90% | 2943 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,185 psi | 85% | 2907 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,534 psi | 87% | 2815 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,201 psi | 89% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,955 psi | 88% | 2887 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,288 psi | 89% | 3018 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 53,983 psi | 87% | 2808 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,927 psi | 90% | 2933 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,911 psi | 86% | 2920 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,041 psi | 87% | 2999 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,420 psi | 90% | 2999 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 82% | 55,071 psi | 88% | 2799 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,288 psi | 87% | 2841 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,868 psi | 88% | 2858 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,376 psi | 89% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,650 psi | 86% | 2936 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,588 psi | 78% | 2854 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 84% | 53,127 psi | 85% | 2854 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,405 psi | 90% | 2999 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,837 psi | 85% | 2995 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,505 psi | 86% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,027 psi | 88% | 3009 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,453 psi | 68% | 2959 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,359 psi | 86% | 2913 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,881 psi | 85% | 2933 fps | 97% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 48,022 psi | 77% | 2753 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,644 psi | 75% | 2749 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 37,724 psi | 60% | 2654 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 45,469 psi | 73% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,156 psi | 55% | 2585 fps | 96.4% |
| Accurate High Country | <<locked>> | 98% | 51,111 psi | 82% | 3028 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 51,343 psi | 82% | 2881 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,511 psi | 70% | 2726 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 47,166 psi | 76% | 2874 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,790 psi | 77% | 2940 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,253 psi | 76% | 2871 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,772 psi | 70% | 2749 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,876 psi | 75% | 2822 fps | 99.6% |
| Alliant Reloder-16 | 42.1 gr | 80% | 33,982 psi | 54% | 2608 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,261 psi | 61% | 2736 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,630 psi | 75% | 2864 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,717 psi | 75% | 2910 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,920 psi | 45% | 2454 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,158 psi | 58% | 2694 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,606 psi | 55% | 2700 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,213 psi | 82% | 2897 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 43,845 psi | 70% | 2759 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 46,717 psi | 75% | 2910 fps | 95.8% |
| Bofors RP7 | <<locked>> | 82% | 41,481 psi | 67% | 2680 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 44,251 psi | 71% | 2766 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 39,001 psi | 63% | 2700 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 84% | 45,324 psi | 73% | 2792 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 51,924 psi | 83% | 2894 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,328 psi | 50% | 2497 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,443 psi | 78% | 2867 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,133 psi | 66% | 2776 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,934 psi | 43% | 1644 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,864 psi | 80% | 2841 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,214 psi | 84% | 2871 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,759 psi | 73% | 2762 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,153 psi | 77% | 2792 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 42,119 psi | 68% | 2713 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,393 psi | 65% | 2657 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 33,025 psi | 53% | 2543 fps | 96% |
| IMR 4895 | <<locked>> | 80% | 48,066 psi | 77% | 2851 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 51,256 psi | 82% | 2854 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,546 psi | 81% | 2808 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,788 psi | 73% | 2759 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,782 psi | 61% | 2605 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 38,290 psi | 61% | 2631 fps | 95.1% |
| Lovex S071 | <<locked>> | 96% | 36,042 psi | 58% | 2615 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 50,183 psi | 80% | 2828 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,792 psi | 81% | 2828 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,209 psi | 74% | 2808 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 48,022 psi | 77% | 2867 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 39,929 psi | 64% | 2795 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 34,272 psi | 55% | 2589 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 46,383 psi | 74% | 2825 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 38,189 psi | 61% | 2690 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,166 psi | 44% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,483 psi | 71% | 2749 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,488 psi | 81% | 2940 fps | 99.9% |
| ReloadSwiss RS 60 | 45.3 gr | 80% | 40,741 psi | 65% | 2802 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,084 psi | 55% | 2608 fps | 95.9% |
| ReloadSwiss RS 70 | 47.2 gr | 82% | 35,969 psi | 58% | 2677 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 47,747 psi | 77% | 2779 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,060 psi | 66% | 2700 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 52,112 psi | 84% | 2907 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 45,527 psi | 73% | 2841 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 41,481 psi | 67% | 2680 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,782 psi | 61% | 2605 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,256 psi | 82% | 2854 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,788 psi | 73% | 2759 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,290 psi | 61% | 2631 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,424 psi | 68% | 2756 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,373 psi | 84% | 2884 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,864 psi | 80% | 2851 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,271 psi | 82% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,120 psi | 69% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,465 psi | 63% | 2602 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,092 psi | 72% | 2838 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 50,908 psi | 82% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,083 psi | 84% | 2874 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,756 psi | 67% | 2707 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 30,879 psi | 50% | 2543 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 43,018 psi | 69% | 2762 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 51,866 psi | 83% | 2753 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,892 psi | 77% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,051 psi | 77% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,682 psi | 64% | 2631 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 35,752 psi | 57% | 2595 fps | 96.8% |
| Vihtavuori N165 | <<locked>> | 96% | 42,351 psi | 68% | 2736 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 46,340 psi | 74% | 2749 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,157 psi | 56% | 2592 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 30,574 psi | 49% | 2530 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,186 psi | 56% | 2569 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 39,233 psi | 63% | 2707 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,079 psi | 45% | 2543 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,951 psi | 80% | 2861 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,861 psi | 74% | 2808 fps | 95.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 95 powders for 6.5 x 64 Brenneke loaded with the .264 | 120gr | Peregrine Glider GRM. Alliant Reloder-26 delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,117 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 60, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for 6.5 x 64 Brenneke with the .264 | 120gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.